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Respiratory tract infection
Respiratory tract infection
refers to any of a number of
infectious diseases
involving the
respiratory tract
. An infection of this type is normally further classified as an
upper respiratory tract infection
(URI or URTI) or a
lower respiratory tract infection
(LRI or LRTI). Lower respiratory infections, such as
pneumonia
, tend to be far more serious conditions than upper respiratory infections, such as the
common cold
.
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